Device for taking samples from wells



R. D. DODDS.

DEVICE FOR TAKING SAMPLE-S FROM WELLS. l

APPLICATION FILED AUGJZ. 1919.

WMM @all ATToRNEx/.s

R. D. Donns.

DEVICE FORTAKING SAMPLES FROM WELLS.

APPLICATION FILED AuG.I2, 1919.

1,335,880.v Patented Apr. 6,1920.

2 SHEETS-SHEET l2- ll lV/a IL 1? 5l l' I 52 LII @JWM A TTORNEY. 6,

' taining accurate samples of the formation I UNITED .STATES PATET.OFFICE REnUs D. Donns, or HOUSTON, TEXAS.

DEVICE FOR TAKING SAMPLES FROM WELLS.

Appli-cation inea August 12, i919. lseriai'na 316,994.

T all whom t may concern: l

Be it known that I, REDUs D. DoDDs, a citizen 4ofthe United States,.residing at Houston, in the county of Harris and State of Texas, Vhaveinvented certain new and useful Improvements in Devices for TakingSamples from Wells, of which the following isl a specification.l

This invention relates to new and useful improvements in a device4 fortaking samples from wells.

through which thebit may pass and withdrawing the same to the surfacefor inspection during the drilling process.

With the above and -other features in view, the linventionhas particularrelation to certain novel'features of construction, arrangement of partsand use, an example ofA which is given in this specification andillustrated in the-accompanying drawings, wherein: v Figures 1, and 2,taken in combination, show a vertical sectional view ofthe device,'Fig.,;/f1, showing the upper portion A thereofan"d Fig. 2, the lowerend thereof.

Fig. 3, is a transverse sectional view taken on the line 3 3 ofFig. 1.

Fig. 4,i is a transverse sectional View taken on the line 4-4 of Fig. 2.

Fig. 5, is a fragmentary vertical sectional` v view taken on theline 5-5of Fig. 4.

Fig. 6, is a vertical sectional view of the implement employed forvlowering the de-` vice in the stem, and

1Fig. 7 shows a vertical sectional view of a fishing tool .forwithdrawing the device 50k from the well." f

Referring now more particularly tothe drawings, wherein like numerals ofreferencedesi ate similar parts in each of the figures, t e numeral 1refers to a tubular drill stem, having the shoe 2, vsecured to the lowerend thereof, and provided with the water passageways 3, 3, on each side.The

Specication of Letters Patent. l Patented Apr. 6, 1920.

shoe also has the vertical. bore 4 therethrough, for the purpose to behereinafter stated.

The numeral 5 vrefers to a tubular barrel -into the upper end of whichthe internal collar 6 is threaded, and whose lower end has thedetachable section 7, attached thereto,the lowerend of said sectionbeing flared and resting upon the internal annular shouli Vder 8,"of theshoe 3. The section 7 also has the opposing dogs, 9, 9, pivoted thereinand which work' through slots 10, 10, `in said section, and also has theopposing vertically movable wedges 11, 11, which are slidably mounted incorresponding slots, 12, cut

lthrough the section 7, said slots 12 being ar-l ranged between the lslots 10. Within the barrel there is a valve seat 13, which is con- 'jtrolled by the Valve 14, and which permitsl the luid'to pass upwardlythrough-the bai'- i rel and said fluid may pass thence out in..

the drill stem through thel orifices 15, l5. Threaded onto the upper endof the collar 6, there is a tubular anchor 16, having the oppositelydisposed vertical slots 17, 17,

through which the anchor blades 18, 18, project.' The bladesare pivotedto the anchor 16 at their lower-ends bymeans of'a bearing pin 19, whichpasses throughfsaid anchor and through alined bearings in the lowerforming the annular shoulder 21. ,A stem ends of the blades. The collar6 has a cen-` i ltrai-bearing 20, whose upper end is enlarged 22operates in the bearing .20 and the uppery end of this stem is formedintoa conical shaped head 23. Surrounding the stem 22 and interposedbetween the shoulder,21.,and

thehead 23, there isa'strongcoilspijing, 24..

The lower ends of the blades 18 areformed into fingers 25, 25, and thespringV l2.4 normally holds the head 23 projected between, said fingers25, so as to hold the bladesopen ,y

and projected through theslots 17 asshown in Fig. 1,' and riveted totheinner sides of the vdrill stem are thel oppositely disposedsaidbl/ades as the'stem rotates and force the same to rotatetherew'ith,jthus driving the shoe 2. The upper end of the tubularanvertical ribs-26, 26, which engage, against.-i

chor 16 carries the gland 27 through which .the rod 28 extends. Thelower end of this rod is enlarged, forming theI annular shoulder 29 andthe enlarged head 30, with. r sulicient clearance to allow it to move upand down without friction. Screwed upon the upper end of the -ro'd 28,there isthe coupling 31, and surrounding the rod 28,

and interposed between. the gland'27, and

the coupling 31, there is a strong coil spring The coupling 31 isextended upwardly, forming the reduced neck 33, and the-annular shoulder34, and threaded upon the upper end of the neck 33, there is acylindrical head 35, whose upper end is conical shaped and has theannular groove 36. Vithin the drill stem 1, are the lingers 37, 37,whose upper ends are hinged to the anchor-38, within said stem. Thelower ends down inthe well, I have .provided .an implement shown in Fig.6, wherein the numeral 40,refers to -a `tubing havinga splder 41, fixedthereon near its lower end with a central orifice 42, through which therod 43` passes, said rgd having an enlarged head 44, at its upper end toprevent its detachment from the spider. The lower end of this rod has ahead 45, to the opposite sides of which are pivoted the levers 46, 46.The lower ends of said levers are turned inwardlyT forming the lingers47, 47, provided to engage in the groove 36 of the head 35. The upperends of the levers are arcuate in forni, being curved inwardly,` andinterposed between them, is the push spring 48, which passes through therod 43, and is provided to hold the fingers 47 in engagement in saidgroove. In order to lower the device into the well, the fingers 47 areengaged over the head as shown in Fig. 6, and the entire device thenlowered, through the medium of a hailing line 49, attached to ythetubing,40,

. the head 44 engaging against the spider y41..

The device is lowered in the stem until the section 7 rests upon theannular shoulder 8, the lower end of said section being flared as aboveexplained, so as to entirely surround the bore 4. The weight of theimplement will then be sustained by the head 35, and is sufficient toovercome the resistance of the springv 32, and forces the shoulder 34below ered, it will -pass over the vupper ends 'ofthe levers 46, andforce them together, disen-A gaging the fing'erst47,vfromr the head 35.

Thereupon the upper. end'of thelrod 43fconl tirets against the stop50,.- fixed thereabm'r .rotate with said stem. The lower end of theshoeis serrated forming sharp cutting teeth 52, and as the shoeprogresses down through the formation, the core is formed which passesthrough the bore 4, up into the barrel. The surplus water admitted,passes-up through the valve 14, and out through the water passagewaysl5.

In Fig. 7 I have shown a form of fishing to`ol for withdrawing thedevice from the drill stem. This tool consists'of a casing 54, whoseupper end is reduced forming a bearing 55, which is provided ,with iuidoutletsv 56, 56. A stem 57 operatesthrough said bearlng to the upperendy of which a chain or the cable 58, is attached. To the lowerv end ofthe stem, there is secured a lhood 59', of a size and form to fit overthe head 35. Flexible fingers 60, 60, are secured at their lower ends tothe inner side of the hood and their upper ends are free.' The fishingtool is let down into the drill stem by means of the cable 58, and thecasing 54 passes over the head and forces the lingers 37, 37 ,foutviwardly, disengagingl them from the shoulder 34, and releasing thespring 32, which limmediately operates to withdraw the head 30 frombetween the upper ends of the blades 1,8. The casing then passes ondownwardly,l engaging against the outer edges of the blades 18, andforcing them inwardly. The lower ends of the fingers 25 operate againstthe sloped sides of the head 2.3 which overcomes the pressure of thespring 24, and thereupon the fingers 60 engageunder the head 35, asshown in Fig. 7.

-Meanwhile, the'lower end of the casing 54 has engaged the outwardlyprojecting sides of the dogs 9, and forces them into engage i 115,

` ment with the core within the barrel, and

has also engaged against the upper ends of the'wedges 11, and forcesthem downwardly.

between the core and the barrel, thus Securely holding said core in saidbarrel. The entire device may be then withdrawn from the drill stem byan upward pullon the cable 58, carrying vwith it, the samples thussecured Ain said barrel. What I claim is":V

- l. The combination with a drill stem, having a core forming boringtool secured to the-lower end thereof, and provided with aboreto receivesaid'cor'e, of a tubular barv force said dogs into engagement with said2. The combination fwith a drill stem,l

having a core forming boring tool secured to the lower end thereof,which is provided With a bore to receive the core, of a tubular barrel,secured in said stem and when in operative position,presting upon saidtool and whose lower end is provided with a plurality of slots,interengaging means carried by the stem land barrel, respectively,whereby the barrel is forced to rotate with the stem, dogs pivoted insome of said slots and vertically movable wedges Working. through theother slots and a casing adapted to fit over said barrel and to engageagainst said dogs and wedges to force them into engagement Jwith thecore, whereby said core may be withdrawn by the withdrawal of saidbarrel. 3. In a device of the character described, a tubular barrel,whose lower end is provided with slots, core engaging dogs pivoted in.some of the said slots and core' engaging wedges slidably mounted in theother slots. et. In a device for taking samples, from wells, a tubularbarrel, whose lower end is provided with slots, a core engaging dogpivoted 1n one of sa1d slots and a core engaging wedge slidably mountedin the other slot and means for engaging said dog and wedge against thecore within said barrel, whereby said core is withdrawn with saidbarrel.

In testimony whereof I have signed my name to this specification in thetwo subscrlblng w1tnesses.

REDUS D. DODDS.

- Witnesses: l

F. W. HOMEYER, M. LooKwooD.

presence of

